Installation Manual

Table Of Contents
Lynx NGT-9000
Installation Manual
0040-17001-01 (Revision W) General Information Page 1-8
1.2.13 Discrete Inputs and Outputs Functional Overview
The Lynx NGT-9000 has discrete inputs and outputs available that can be interfaced to indicator lamps and
cockpit switches. The discretes are optional except as noted in the instructions found in the installation
section. Input and output discretes are normally open and are set to ground when active, unless otherwise
indicated.
(Discrete Input 1) The IDENT switch activates the IDENT pulse, which highlights the aircraft’s
symbol on the ATC’s radar screen and is identified on the Lynx NGT-9000 or external display /
control panel when active.
(Discrete Input 2) The Audio Mute input is used to mute all audio outputs coming from the Lynx
NGT-9000. Audio mute can be connected to other Caution and Warning Systems (CAWS) if
required (i.e. TAWS) that needs to mute the traffic system for a higher priority audio annunciation.
(Discrete Input 3) The On-Ground input (i.e. WOW) is used to signal the Lynx NGT-9000 that the
aircraft is on ground. The input can be connected to a squat switch, airspeed monitor, or a collective
switch. This discrete can be set in the DCM settings to either ground on ground, open on ground, or
not used.
(Discrete Input 4) The Audio Acknowledge input is used to cancel the audio from a TAWS or
Traffic Aural. This discrete is used only when the optional TAWS, TAS/TCAS, or ATAS
functionality is configured.
(Discrete Input 5) Release 3.2 and later. The Control Panel Select input is used to select ARINC 429
interfaced Control Panel #1 or #2. This input must be connected to the control panel LRU that
performs this selection.
(Discrete Input 6) The Standby Mode input is used to place the unit’s transponder into Standby. It is
intended for use when dual transponders are installed on the aircraft.
(Discrete Output 1) The TAWS Caution lamp (amber) is used to indicate a terrain caution advisory is
present.
(Discrete Output 2) The TAWS Warning lamp (red) is used to indicate a terrain warning is present.
(Discrete Output 3) The Traffic Alert lamp (amber) is used to indicate a TAS/TCAS, or ATAS
Traffic Advisory (TA).
(Discrete Output 5) The Audio Mute can be connected to other CAWS alerting systems, if required,
that need to mute the traffic system (i.e. TAS/TCAS) for a higher priority audio annunciation (i.e.
TAWS). This output will be active when the Audio Mute Input (Discrete Input 2) is active.
(Discrete Output 6) The ADS-B Out Fail lamp (amber) is used to indicate that ADS-B out is not
providing ADS-B output data. The lamp has multiple visual cues used to identify operational status.
Refer to the installation checkout section for details.